Sanctions, including an attempted blockade [1] of oil exports, imposed by the British Empire, still in existence at the time, in response to a dispute over the ownership of Iranian oil fields, which were a primary factor in the fall of Mossadegh. See e.g.:
It should be noted that while the Shah obviously benefited from the coup, he remained suspicious of the Western powers who had supported it; he was not foolish enough to believe they were honest allies. Consequently, he was inclined to support attempts at autarky.
https://harpers.org/archive/2013/07/the-tragedy-of-1953/
It should be noted that while the Shah obviously benefited from the coup, he remained suspicious of the Western powers who had supported it; he was not foolish enough to believe they were honest allies. Consequently, he was inclined to support attempts at autarky.
1: https://www.mohammadmossadegh.com/news/new-york-times/march-...